管线管L245N/M/NS/QS钢管弯头 PSL-2 GB/T9711-2017标准 ¥6600.00 耐海水腐蚀材料10CrMoAL焊接弯头法兰异径管件 ¥740.00 电厂用厚壁高压12Cr9MO 1Cr9Mo A335P9无缝热压弯头钢管 ¥80.00 电厂用12Cr5MO P5 1Cr5Mo无缝热压弯头厚壁高压 ¥130.00 管线钢L360法兰L245/L390/L415/L485法兰弯头ASME B16.5 ¥320.00 L360N/L360M/L360法兰平焊带颈对焊盲板ASME B16.5 ¥580.00